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Use of polymeric sub-micron ion-exchange resins for removal of lead,copper,zinc,and nickel from natural waters

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Journal of Environmental Sciences 2019年第1期31卷 247-254页

作者： Audrey Murray banu ?rmeci Department of Civil and Environmental Engineering Carleton University

This research investigated the removal capacity of polymeric sub-micron ion-exchange resins(SMR) for removal of lead, copper, zinc, and nickel from natural waters in competition with natural organic matter(NOM). Polymeric SMR particles were created and tested to ensure that they were adequately dispersed in the solution. They removed little NOM(10%or less) from river water and wastewater, indicating that competition from NOM was not a major concern. SMR were able to remove 82% ± 0.2% of lead, 46% ± 0.6% of copper, 55% ±20% of zinc, and 17% ± 2% of nickel from river water spiked with 500 μg/L of each. Similarly,in wastewater, they were able to remove 86% ± 0.1% of lead, 38% ± 0.8% of copper, 28% ± 1%of zinc, and 11% ± 1% of nickel.

关键词： Water Wastewater Heavy metals Ion exchange Polymeric submicron resin Natural organic matter (NOM)

Competitive effects of humic acid and wastewater on adsorption of Methylene Blue dye by activated carbon and non-imprinted polymers

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Journal of Environmental Sciences 2018年第4期30卷 310-317页

作者： Audrey Murray banu Ormeci Department of Civil and Environmental Engineering Carleton UniversityOttawa ON K1S 5B6 Canada

Natural organic matter（NOM）, present in natural waters and wastewater, decreases adsorption of micropollutants, increasing treatment costs. This research investigated mechanisms of competition for non-imprinted polymers（NIPs） and activated carbon with humic acid and wastewater. Three different types of activated carbons（Norit PAC 200,Darco KB-M, and Darco S-51） were used for comparison with the NIP. The lower surface area and micropore to mesopore ratio of the NIP led to decreased adsorption capacity in comparison to the activated carbons. In addition, experiments were conducted for single-solute adsorption of Methylene Blue（MB） dye, simultaneous adsorption with humic acid and wastewater, and pre-loading with humic acid and wastewater followed by adsorption of MB dye using NIP and Norit PAC 200. Both the NIP and PAC 200 showed significant decreases of 27% for NIP（p = 0.087） and 29% for PAC 200（p = 0.096） during simultaneous exposure to humic acid and MB dye. There was no corresponding decrease for NIP or PAC 200 pre-loaded with humic acid and then exposed to MB. In fact, for PAC 200, the adsorption capacity of the activated carbon increased when it was pre-loaded with humic acid by 39%（p = 0.0005）. For wastewater, the NIP showed no significant increase or decrease in adsorption capacity during either simultaneous exposure or pre-loading. The adsorption capacity of PAC 200 increased by 40%（p = 0.001） for simultaneous exposure to wastewater and MB. Pre-loading with wastewater had no effect on MB adsorption by PAC 200.

关键词： Molecularly imprinted polymer Non-imprinted polymer Water treatment Wastewater treatment Activated carbon Micropollutants Pore-blocking Adsorption

An Effective Discrete Artificial Bee Colony Based SPARQL Query Path Optimization by Reordering Triples

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Journal of Computer Science & Technology 2021年第2期36卷 445-462页

作者： Zeynep banu Ozger Nurgul Yuzbasioglu Uslu Department of Computer Engineering Sutcu Imam UniversityKahramanmaras 46040Turkey Department of Computer Engineering Yildiz Technical UniversityIstanbul 34220Turkey

Semantic Web has emerged to make web content machine-readable,and with the rapid increase in the number of web pages,its importance has *** description framework(RDF)is a special data graph format where Semantic Web data are stored and it can be queried by SPARQL query *** challenge is to find the optimal query order that results in the shortest period of *** this paper,the discrete Artificial Bee Colony(dABCSPARQL)algorithm is proposed,based on a novel heuristic approach,namely reordering SPARQL *** processing time of queries with different shapes and sizes is minimized using the dABCSPARQL *** performance of the proposed method is evaluated on chain,star,cyclic,and chain-star queries of different sizes from the Lehigh University Benchmark(LUBM)*** results obtained by the proposed method are compared with those of ARQ(a SPARQL processor for Jena)query engine,the Ant System,the Elitist Ant System,and MAX-MIN Ant System *** experiments demonstrate that the proposed method significantly reduces the processing time,and in most queries,the reduction rate is higher compared with other optimization methods.

关键词： artificial bee colony resource description framework(RDF) query optimization reordering triple pattern SPARQL

Wind energy feasibility and wind turbine selection studies for the city Surat,India

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Clean Energy 2024年第3期8卷 166-173页

作者： Arshi banu P S Maanat Bhadani Hindustan Institute of Technology and Science ChennaiIndia The Doon School UttarakhandDehradunIndia

Wind energy represents a clean,abundant and cost-effective power source,fostering job growth and environmental *** wind energy harnesses several gigawatts today,its availability hinges on diverse factors,with geographical location standing *** turbines,with varying capacity ranges,saturate the *** site-specific suitability and matching the appropriate turbine to meet specific requirements are of paramount *** study aims to assess the feasibility of wind energy in Surat,Gujarat,India and select an optimal small commercial turbine for residential *** research involves Rayleigh and Weibull probability distribution functions based on yearlong velocity *** distributions are fitted with actual data,revealing the most probable velocity(v_(mf)=3 m/s)and velocity at maximum power(v_(pmax)=5 m/s).The power availability of the site has been assessed as 42.6 W/m^(2)using both graphical and analytical *** commercial turbines have been shortlisted based on on-site power criteria and their specifications are evaluated against site power availability.A comparative analysis culminates in identifying the most suitable turbine for the *** best suitable turbine for the site with an annual energy yield of 8 MW has been suggested amongst selected turbines for small-scale residential applications.

关键词： site feasibility wind energy commercial wind turbine probability distribution function rated power

Synthesis and characterization of monosize magnetic poly(glycidyl methacrylate) beads

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China Particuology 2007年第1期5卷 174-179页

作者： Evrim banu Alt■ntas■ Lokman Uzun Adil Denizli Department of Chemistry Biochemistry Division Hacettepe University Ankara Turkey

Monosize, 1.6 μm, magnetic beads of poly（glycidyl methacrylate） [M-poly（GMA）], were prepared by dispersion polymerization in the presence of Fe3O4 nano-powder. Monosize M-poly（GMA） beads were characterized by swelling tests, density measurements, electron spin resonance （ESR）, vibrating sample magnetometer （VSM） and scanning electron microscopy （SEM）. The characteristic functional groups of M-poly（GMA） beads were analyzed by Fourier transform infrared spectrometer （FTIR）. The M-poly（GMA） beads are highly uniform in size and have a spherical shape and non-porous structure. Polydispersity index （PDI） of M-poly（GMA） beads was calculated to be around 1.008. The hydrated density of the M-poly（GMA） beads measured at 25 ℃ was 1.14 g/cm^3. The content of oxirane groups on the surface of the M-poly（GMA） sample was found to be 3.46 mmol/g by using perchloric acid titration. The specific surface area of the M-poly（GMA） beads was determined to be 3.2 m^2/g. The equilibrium swelling ratio was 52%. The volume fraction of magnetite nanopowder in the M-poly（GMA） beads was found to be 4.5%. The g factor, that can be considered as a quantity characteristic of the molecules in which the unpaired electrons are located, was found to be 2.28 for M-poly（GMA）. The external magnetic field at resonance was calculated to be 2055 Gs which was found sufficient to excite all of the dipole moments present in 1.0 g of M-poly（GMA） sample.

关键词： Polyglycidyl methacrylate Monosize beads Magnetic materials

△_(h)-GOULD-HOPPER APPELL POLYNOMIALS

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Acta Mathematica Scientia 2021年第4期41卷 1196-1222页

作者： Mehmet Ali ÖZARSLAN banu YILMAZ YASAR Department of Mathematics Eastern Mediterranean UniversityFamagustaNorth Cyprus via Mersin 10Turkey

In this paper,we introduce the △_(h)-Gould-Hopper Appell polynomials An(x,y;h)via h-Gould-Hopper polynomials G_(n)^(h)(x,y).These polynomials reduces to △_(h)-Appell polynomials in the case y=0,△-Appell polynomials in the case y=0 and h=2D-Appell polynomials in the case h→0,2D △-Appell polynomials in the case h=1 and Appell polynomials in the case h→0 and y=*** obtain some well known main properties and an explicit form,determinant representation,recurrence relation,shift operators,difference equation,integro-difFerence equation and partial difference equation satisfied by *** satisfied by △_(h)-Gould-Hopper Appell polynomials reduce to determinant of all subclass of the usual ***,shift operators and difference equation satisfied by these polynomials reduce to recurrence,shift operators and difference equation of △_(h)-Appell polynomials,△-Appell polynomials;recurrence,shift operators,differential and integro-differential equation of 2D-Appell polynomials,recurrence,shift operators,integrodifference equation of 2D △-Appell polynomials,recurrence,shift operators,differential equation of Appell polynomials in the corresponding *** the special cases of the determining functions,we present the explicit forms,determinants,recurrences,difference equations satisfied by the degenerate Gould-Hopper Carlitz Bernoulli polynomials,degenerate Gould-Hopper Carlitz Euler polynomials,degenerate Gould-Hopper Genocchi polynomials,△_(h)-Gould-Hopper Boole polynomials and △_(h)-Gould-Hopper Bernoulli polynomials of the second *** particular cases of the degenerate Gould-Hopper Carlitz Bernoulli polynomials,degenerate Gould-Hopper Genocchi polynomials,△_(h)-Gould-Hopper Boole polynomials and △_(h)-Gould-Hopper Bernoulli polynomials of the second kind,corresponding determinants,recurrences,shift operators and difference equations reduce to all subclass of degenerate so-called families except for Genocchi polynomials recurrence,shift operators,an

关键词： △_(h)-Appell polynomials determinant recurrence difference equation

Use of sub-micron sized resin particles for removal of endocrine disrupting compounds and pharmaceuticals from water and wastewater

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Journal of Environmental Sciences 2017年第1期29卷 256-264页

作者： Audrey Murray banu rmeci Edward P.C.Lai Department of Civil and Environmental Engineering Carleton University Department of Chemistry Carleton University

Endocrine disrupting compounds（EDCs） and pharmaceuticals pose a challenge for water and wastewater treatment because they exist at very low concentrations in the presence of substances at much higher concentrations competing for adsorption ***-micron sized resin particles（approximately 300 nm in diameter）（SMR） were tested to evaluate their potential as a treatment for EDCs including：17-β estradiol（E2）,17-α ethinylestradiol（EE2）,estrone（E1）,bisphenol A（BPA）,and diethylstilbestrol（DES） as well as 12 *** were able to remove 98%of spiked E2,80%of EE2,87%of BPA,and up to 97%of DES from *** a 0.5 ppm mixture of E2,EE2,E1,BPA and DES,the minimum removal was24%（E2） and the maximum was 49%（DES）.They were also able to remove the pharmaceuticals from deionized water and ***,SMR are a promising advanced treatment for removal of both EDCs and pharmaceuticals.

关键词： Water treatment Wastewater treatment Pharmaceuticals Endocrine disrupting compounds Micropollutants Adsorption

Effect of seaweed coating on quality characteristics and shelf life of tomato (Lycopersicon esculentum mill)

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Food Science and Human Wellness 2020年第2期9卷 176-183页

作者： Thahira banu A Sri Ramani P Aswini Murugan School of Sciences Department of Home ScienceThe Gandhigram Rural Institute–(Deemed to be University)Gandhigram624302DindigulTamil NaduIndia

Seaweeds are the natural marine algae which have several properties to act as natural preservatives to extend the shelf life of perishable foods without affecting their quality and causing side *** available and cheap fruits such as tomato are perishable very easily due to its high water *** gel coating is a good choice,easily available and cheap natural preservative abundantly available in the Indian *** present study was undertaken to extend the shelf life of the tomatoes using seaweed gel coating at different *** seaweeds namely Kappaphycus alvarezii(red algae)and Sargassum tenerrimum(brown algae)was selected due to their high gelling *** seaweeds were collected in dry form from Aqua Agri Processing Limited,Mana Madurai(SIPCOT)Tamil Nadu,*** seaweed extracts were tested for phytonutrients,antibacterial and anti-fungal activity using standard *** shelf life of seaweed coated tomatoes using different concentrations of the seaweed extract(gel)was *** the results,it is understood that the phytonutrients namely flavonoids,steroids,saponins and tannins are present in both the selected *** and antifungal activity of Kappaphycus alvarezii showed higher inhibition zone than *** against common *** characteristics and shelf life evaluation was based on water loss,texture,ascorbic acid content,juice content,total soluble solids(TSS),total acidity and TSS/total acidity ratio,*** results pointed out that *** was the most effective in maintaining the quality characteristics of tomato fruits and it also supports the fruit quality during storage period than ***,from the results of the study it is concluded that the better quality characteristics and shelf life of tomatoes can be increased by coating seaweed gel and it can be used as a bio preservative in fruit and vegetable preservation.

关键词： Seaweeds Preservatives Antibacterial Antifungal Phytonutrients Inhibition

Association of apolipoprotein E-219T>G promoter polymorphism with primary open angle glaucoma in Turkish population

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International Journal of Ophthalmology(English edition) 2014年第3期7卷 426-430页

作者： Emel Saglar banu Bozkurt Murat Irkec Department of Molecular Biology Faculty of ScienceHacettepe University Department of Ophthalmology Selcuk University Faculty of Medicine Department of Ophthalmology Hacettepe University Faculty of Medicine

AIM:To investigate the association between apolipoprotein E(APOE)-219 T>G promoter polymorphism and primary open angle glaucoma(POAG).METHODS:Patients and healthy subjects were genotyped with polymerase chain reaction-restriction fragment length polymorphism(PCR-RFLP).Genotype/allele frequencies were compared between 122 healthy subjects and in 75 POAG patients using Chi-square ***:Although the frequency of APOE-219 GG genotype was higher in POAG group(13.3%)than in control group(6.6%),this finding was not statistically significant(P=0.09).In glaucoma patients carrying GG genotype,mean linear C/D ratio was higher and progression was more compared to glaucoma patients with GT ***:APOE-219 T>G polymorphism does not seem to be a risk factor for the presence of glaucoma,but might play a role in deterioration of the disease,which needs further evaluation.

关键词： apolipoprotein E primary open angle glaucoma promoter single nucleotide polymorphism